NASHUA – Police arrested a Nashua resident last week who they said stabbed a man who tried to intervene in a domestic assault.

Police were called to a Nashua residence shortly after 2 a.m. Thursday for a report of a domestic disturbance during which a man was stabbed.

When they arrived, officers were told Ernie Roig, 26, had been involved in an altercation with a woman and that he had threatened her with a knife and assaulted her, police said.

A family member stepped in to stop the altercation and was stabbed in the stomach by Roig, police said.

The male family member was brought to a city hospital with non-life-threatening injuries and the woman who was involved had only minor injuries, according to police.

Roig was charged with domestic violence: first-degree assault and two counts each of domestic violence: criminal threatening and domestic violence: simple assault.

He was held on $100,000 cash only bail and arraigned at Nashua district court on Monday, police said.

The Class A felony assault charge is punishable by up to 15 years in prison plus fines. The Class B felony threatening charges are each punishable by up to seven years in prison plus fines, and the misdemeanor simple assault charges are punishable by up to a year in jail plus fines, police said.

Joseph G. Cote can be reached at 594-6415 or jcote@nashuatelegraph.com. Also, follow Cote on Twitter (@Telegraph_JoeC).